CVE-2025-52949 Information

Jul 12, 2025 cve

Description

An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

Only systems configured for Ethernet Virtual Private Networking (EVPN) signaling are vulnerable to this issue. 

This issue affects iBGP and eBGP and both IPv4 and IPv6 are affected by this vulnerability.This issue affects:

Junos OS: 

all versions before 21.4R3-S11 
from 22.2 before 22.2R3-S7 
from 22.4 before 22.4R3-S7 
from 23.2 before 23.2R2-S4 
from 23.4 before 23.4R2-S5 
from 24.2 before 24.2R2-S1 
from 24.4 before 24.4R1-S3 24.4R2; 

Junos OS Evolved: 

all versions before 22.2R3-S7-EVO 
from 22.4-EVO before 22.4R3-S7-EVO 
from 23.2-EVO before 23.2R2-S4-EVO 
from 23.4-EVO before 23.4R2-S5-EVO 
from 24.2-EVO before 24.2R2-S1-EVO 
from 24.4-EVO before 24.4R1-S3-EVO 24.4R2-EVO.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://supportportal.juniper.net/JSA100053

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5

CNNVD-202507-1654 (Published: 2025-07-11)

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